1. PAINPOINT DRIVEN OPENING

Are you managing gold recovery operations where inefficient primary crushing and grinding is creating bottlenecks? Operational challenges with traditional comminution equipment directly impact your bottom line. Consider these common pain points:
High Operational Costs: Excessive energy consumption per ton of ore processed and frequent, costly maintenance on wear parts.
Inconsistent Liberation: Poorly calibrated crushing can fail to adequately liberate gold from host rock, leading to recoverable gold reporting to tailings.
Excessive Downtime: Lengthy, manual shutdowns for liner replacement and maintenance disrupt continuous processing schedules.
Scalability Limitations: Equipment that cannot handle variable feed sizes or scale with increased throughput demands.
Safety & Labor Intensity: Older mechanical systems often require more manual intervention, increasing operational risk.

Is your current solution maximizing recovery yield while controlling operational expenditure? The right primary crushing technology is foundational to addressing these challenges.

2. PRODUCT OVERVIEW

A modern Stamp Mill for gold mining is a mechanized, heavyduty milling machine designed for the primary crushing and coarse grinding of goldbearing ore. It functions as a critical firststage liberation unit, breaking down runofmine (ROM) ore to a size suitable for further processing in ball mills or concentration circuits.

Operational Workflow:
1. Feed Introduction: ROM ore is fed into a sturdy mortar box, typically via a grizzly feeder to regulate size.
2. Mechanical Percussion: Powered camshafts lift and drop a series of heavy, weighted stamps (shoes) onto the ore bed contained within the mortar box.
3. Ore Reduction: The repeated, highimpact force of the stamps fractures the ore through compression and impact breakage.
4. Slurry Discharge: Crushed material is washed through a discharge screen with water, creating a slurry that flows to the next stage of processing.
5. Waste Removal: Occasionally, hard, noncrushable material (e.g., tramp metal) is manually cleared from the mortar box.

Application Scope & Limitations:
Scope: Ideal for hard rock gold ore (quartz veins), small to mediumscale operations, and regions with reliable water supply. Serves as a robust, relatively simple primary crusher/grinder.
Limitations: Not suitable for soft, clayrich ores that cause packing; less energyefficient than some modern cone crushers for very hightonnage operations; requires consistent mechanical maintenance.

3. CORE FEATURES

Modular Stamp Assembly | Technical Basis: Individually mounted stamp columns with replaceable shoes | Operational Benefit: Isolate and replace wear components on a single stamp without halting the entire mill. Maintenance crews can address issues in under two hours versus a fullday shutdown. | ROI Impact: Reduces planned downtime by up to 70%, directly increasing annual operating hours and throughput.

Hardened Alloy Wear Shoes | Technical Basis: Highchrome cast iron or manganese steel casting engineered for abrasion resistance | Operational Benefit: Shoes withstand prolonged impact with minimal deformation, maintaining consistent crush geometry and product size distribution over extended campaigns. | ROI Impact: Extends service life by 4050% over standard steel parts, lowering costperton for consumables.

Variable Camshaft Speed Control | Technical Basis: VFDdriven motor coupled to a reinforced camshaft assembly | Operational Benefit: Operators can adjust stampsperminute (SPM) to match ore hardness and feed size, optimizing fragmentation efficiency and power draw in realtime. | ROI Impact: Field data shows up to 15% reduction in specific energy consumption (kWh/ton) when tuned correctly.

Integrated Water Flush System | Technical Basis: Strategically placed nozzles provide continuous slurry transport and dust suppression within the mortar box | Operational Benefit: Prevents chokeups, ensures steady material flow, and eliminates airborne silica dust at the source—a critical health and safety benefit. | ROI Impact: Improves operational continuity; reduces water usage by 25% compared to manual flushing methods.

HeavyDuty Foundation Frame | Technical Basis: Fabricated steel frame with vibrationdampening isolators engineered for dynamic loads | Operational Benefit: Absorbs intense cyclical impact forces, protecting plant infrastructure from cracking and misalignment. Ensures longterm operational stability with minimal harmonic disturbance. | ROI Impact: Eliminates foundational repair costs and extends the service life of ancillary equipment.

4. COMPETITIVE ADVANTAGES

| Performance Metric | Industry Standard (Legacy Stamp Mill/Jaw Crusher) | Modern Stamp Mill Solution | Advantage (% improvement) |
| : | : | : | : |
| Availability / Uptime | ~85%, frequent full stops for maintenance | ~94%, modular design enables partial repairs | +9% operational time |
| Specific Energy Consumption| High; fixed speed operation often wastes power on softer ore| Optimized; variable speed allows matching power to ore competency| Up to 15% reduction |
| Wear Part Cost per Ton Processed| Higher due to shorter life & full set replacement| Lower via extendedlife alloys & modular replacement| 2535% reduction |
| Product Size Consistency (10 mesh)| Variable; dependent on shoe wear & manual adjustment| Consistent; maintained wear profile & controlled drop height improves PSD.| +20% consistency |
| Safety Profile| Higher risk from proximity to moving parts during operation| Improved; guarded drives & automated flush reduce exposure incidents.| Significant reduction in exposure events |

5. TECHNICAL SPECIFICATIONS

Model Range Capacity: 1 – 10 TPH (dry feed basis), depending on model configuration (3stamp to 10stamp units).
Power Requirements: 15 – 75 kW main drive motor (VFD controlled), dependent on stamp weight and count.
Material Specifications:
Mortar Box Liner: Abrasionresistant steel plate (>400 BHN).
Stamps/Shoes: HighChrome Cast Iron (HCCI) or Manganese Steel.
Frame & Camshaft: ASTM A36 Structural Steel / Forged Alloy Steel.
Physical Dimensions (Typical 5Stamp Unit): ~4m L x 2m W x 3m H (foundation footprint required).
Environmental Operating Range: Designed for ambient temperatures from 20°C to +50°C. Requires dust control or indoor siting in arid environments.

6. APPLICATION SCENARIOS

SmallScale Hard Rock Mine (West Africa) | Challenge A lowcapital operation using manual jaw crushers faced low throughput (<0.5 TPH), high labor costs, and inconsistent particle size affecting cyanidation leach recovery.| Solution Installation of a compact, dieselpowered 3stamp mill with integrated grizzly feed.| Results Throughput increased to 1.8 TPH consistently. Liberated gold recovery in downstream leaching improved by an estimated 12% due to more uniform feed size.

Historic Mine Tailings Reprocessing Project (North America) Challenge Processing old tailings with variable hardness required robust but flexible crushing that could handle occasional hard fragments without jamming.| Solution A modular 5stamp mill with VFD control was deployed as the primary grinder.| Results The system processed abrasive material at 4 TPH while adjusting stamp drop frequency based on sensor feedback. Downtime from "uncrushables" was eliminated via the manual clearing pocket.

7 COMMERCIAL CONSIDERATIONS

Equipment Pricing Tiers:
Tier I Standard Duty Unit (~$50k$120k): For lower tonnage (2TPH), includes enhanced dust sealing premium isolators automated grease systems
Optional Features:
Diesel power packs
Advanced vibration monitoring sensors
Automated tramp metal detection
Spare parts starter kits

Service Packages:
1 Basic Warranty covering parts for months
2 Extended Service Plan including annual inspections & discounted wear parts
3 Full OnSite Support Package featuring training installation supervision

Financing Options Available capital lease structures operating leases project financing support can be arranged through partners

8 FAQ

What feed size can your stamp mill accept?
It is engineered optimally process ROM ore up mm diameter Efficient operation requires prescreening remove oversize fines

How does product output compare jaw crusher ball mill circuit?
Our stamp mill produces finer more consistent product than jaw crusher alone typically generating significant proportion sub mesh material suitable direct feeding agitated leach circuit coarse grinding stage

What are ongoing maintenance requirements?
Primary tasks involve periodic inspection replacement shoes every months depending abrasiveness scheduled lubrication camshaft bearings Monthly visual checks foundation bolts isolators are recommended

Are spare parts readily available?
We maintain inventory critical wear parts shoes liners bushings ensure availability Standardized designs mean lead times nonproprietary components are minimized

Can this integrate existing processing plant?
Yes units are designed bolt existing concrete foundations slurry discharge configured match your current launder piping system Electrical requirements standard industrial voltage frequency

What typical installation commissioning timeline?
From delivery site mechanical installation electrical connection require approximately working days Commissioning operator training adds days provided foundation prepared advance